Infrared radiation detector



FIG. 1 is a front elevational view of an infrared radiation detector showing our new design;

FIG. 2 is a side elevational view thereof, the opposite side being identical except for the nut on the end of the bolt in the bracket;

FIG. 3 is a top plan view thereof, the bottom being a mirror image;

FIG. 4 is a top, front isometric view thereof. 

The ornamental design for an infrared radiation detector, as shown and described. 